Suitable for people who have hearing, vision or dexterity impairments, BT's 4000 Big Button Telephone is accessible and easy to use. It not only has oversized buttons that are more easily identifiable, but it also features a large graphic display with clear text and poses no problem to hearing aid users. Featuring 50 saved numbers and the ability to block calls, this wireless DECT telephone provides a range of functions beyond its accessibility.